updates

kernel/bin/mount

@@ -0,0 +1,205 @@
+/* BARE_OS_BIN_API 1.0.0 — bump when staged /bin script semantics change (see developer guide). */
+/** Shared helpers for drive-resident /bin scripts (prepended before each command). */
+function bareStdin(ctx) {
+  return typeof ctx.shellStdin === 'string' ? ctx.shellStdin : ''
+}
+
+/** @param {number} mode @param {'file' | 'directory' | 'symlink'} type */
+function bareFormatModeString(mode, type) {
+  const typeChar = type === 'directory' ? 'd' : type === 'symlink' ? 'l' : '-'
+  const perm = mode & 0o777
+  const r = (bit) => (perm & bit ? 'r' : '-')
+  const w = (bit) => (perm & bit ? 'w' : '-')
+  const x = (bit) => (perm & bit ? 'x' : '-')
+  return (
+    typeChar +
+    r(0o400) +
+    w(0o200) +
+    x(0o100) +
+    r(0o040) +
+    w(0o020) +
+    x(0o010) +
+    r(0o004) +
+    w(0o002) +
+    x(0o001)
+  )
+}
+
+/** @param {number} mtimeMs @param {number} [nowMs] */
+function bareFormatLsMtime(mtimeMs, nowMs) {
+  const now = nowMs != null ? nowMs : Date.now()
+  const d = new Date(mtimeMs)
+  const months = [
+    'Jan',
+    'Feb',
+    'Mar',
+    'Apr',
+    'May',
+    'Jun',
+    'Jul',
+    'Aug',
+    'Sep',
+    'Oct',
+    'Nov',
+    'Dec'
+  ]
+  const mon = months[d.getMonth()]
+  const day = String(d.getDate()).padStart(2, ' ')
+  const sixMo = 180 * 24 * 3600 * 1000
+  if (Math.abs(now - mtimeMs) > sixMo) {
+    const yr = String(d.getFullYear()).padStart(4, ' ')
+    return mon + ' ' + day + '  ' + yr
+  }
+  const hh = String(d.getHours()).padStart(2, '0')
+  const mm = String(d.getMinutes()).padStart(2, '0')
+  return mon + ' ' + day + ' ' + hh + ':' + mm
+}
+
+/** @param {number} size */
+function barePosixBlocks(size) {
+  return Math.ceil(Number(size) / 512) || 0
+}
+
+/**
+ * Raw stdout for NUL/binary when **`process.stdout.write`** is missing.
+ * If **`ctx.bareOsBinWrite(Uint8Array|string)`** is set (tests / host), use it.
+ * @param {Record<string, unknown>} ctx
+ * @param {string | Uint8Array} chunk
+ * @returns {boolean}
+ */
+function bareOsEmitRaw(ctx, chunk) {
+  if (typeof ctx.bareOsBinWrite === 'function') {
+    const b4 = ctx.b4a
+    const u8 =
+      typeof chunk === 'string'
+        ? b4 && typeof b4.from === 'function'
+          ? b4.from(chunk)
+          : new TextEncoder().encode(chunk)
+        : chunk
+    ctx.bareOsBinWrite(u8 instanceof Uint8Array ? u8 : new Uint8Array(u8))
+    return true
+  }
+  const w = globalThis.process?.stdout?.write
+  if (typeof w === 'function') {
+    w.call(globalThis.process.stdout, chunk)
+    return true
+  }
+  return false
+}
+
+async function printMountTable(ctx) {
+  try {
+    const buf = await ctx.vfs.readFile('/proc/mounts')
+    if (buf) {
+      const s = ctx.b4a.toString(buf)
+      if (s) {
+        ctx.console.log(s.endsWith('\n') ? s.slice(0, -1) : s)
+        return
+      }
+    }
+  } catch {
+    /* fall through */
+  }
+  ctx.console.log('(no mounts)')
+}
+
+async function run(ctx, argv) {
+  const args = argv.slice(1)
+  if (!args.length) {
+    await printMountTable(ctx)
+    return
+  }
+
+  let type = 'hyperdrive'
+  let opts = ''
+  /** @type {string[]} */
+  const pos = []
+  for (let i = 0; i < args.length; i++) {
+    const a = args[i]
+    if (a === '-t') {
+      i++
+      if (i >= args.length) {
+        ctx.console.error('mount: option requires an argument -- t')
+        ctx.exitCode = 1
+        return
+      }
+      type = String(args[i] || '')
+      continue
+    }
+    if (a === '-o') {
+      i++
+      if (i >= args.length) {
+        ctx.console.error('mount: option requires an argument -- o')
+        ctx.exitCode = 1
+        return
+      }
+      opts = String(args[i] || '')
+      continue
+    }
+    if (a.startsWith('-')) {
+      ctx.console.error('mount: unsupported option ' + a)
+      ctx.exitCode = 1
+      return
+    }
+    pos.push(a)
+  }
+
+  if (type !== 'hyperdrive') {
+    ctx.console.error('mount: only -t hyperdrive is supported')
+    ctx.exitCode = 1
+    return
+  }
+  if (pos.length < 2) {
+    ctx.console.error(
+      'usage: mount [-t hyperdrive] [-o ro] <source-key|local> </mnt/label>'
+    )
+    ctx.exitCode = 1
+    return
+  }
+  const source = String(pos[0] || '').trim()
+  const target = String(pos[1] || '').trim()
+  const m = /^\/mnt\/([a-zA-Z0-9][a-zA-Z0-9._-]{0,62})$/.exec(target)
+  if (!m) {
+    ctx.console.error('mount: target must be /mnt/<label>')
+    ctx.exitCode = 1
+    return
+  }
+  const label = m[1]
+  const ro = opts
+    .split(',')
+    .map((x) => x.trim())
+    .filter(Boolean)
+    .includes('ro')
+
+  if (typeof ctx.bareOsSyscall === 'function') {
+    try {
+      const out = await ctx.bareOsSyscall('mount', {
+        source,
+        target,
+        label,
+        readOnly: ro
+      })
+      if (out && typeof out === 'object' && out.note) {
+        ctx.console.log(String(out.note))
+      }
+      return
+    } catch (e) {
+      ctx.console.error('mount: ' + (e?.message || String(e)))
+      ctx.exitCode = 1
+      return
+    }
+  }
+
+  if (typeof ctx.runHdms !== 'function') {
+    ctx.console.error('mount: hdms bridge unavailable')
+    ctx.exitCode = 1
+    return
+  }
+  try {
+    if (source === 'local') await ctx.runHdms(['hdms', 'create', label])
+    else await ctx.runHdms(['hdms', 'add', label, source])
+  } catch (e) {
+    ctx.console.error('mount: ' + (e?.message || String(e)))
+    ctx.exitCode = 1
+  }
+}